Aromatic hydrocarbons, C 20-28 , polycyclic, mixed coal-tar pitch- polyethylene pyrolysis-derived; Pyrolysis products (A complex combination of hydrocarbons obtained from mixed coal tar pitch-polyethylene pyrolysis. Composed primarily of polycyclic aromatic hydrocarbons having carbon numbers predominantly in the range of C 20 through C 28 and having a softening point of 100 to 220 °C according to DIN 52025.)